R. FRIEDLANDER & SOHN, 



BERLIN, W. H. 6 

 JUST PUBLISHED 



Nomenclatoranimaliuni generum 

 et subgenerum 



Specimen-Part 



Primatium genera et subgenera 



Im Auftrage der k. Prenas. Akademie der Wissen- 

 Bchaften fiir Berlin herausgegeben von 



Fr. E. SCHULZE 



Price of the Specimen-Part 



17 pp. Royal 8vo, $0.25 



Price of the Nomcnclator 



2 Vols, when complete, $24 



Prospectus sent on application 



Announcement 

 Daytime and Evening 



Exercises in Astronomy 



of 



By SARAH FRANCES WHITING, Director 

 Whitin Observatory Welicsiey Cotleee 



This is the first textbook to be published for this 

 interesting study. It consists of a series of exercises 

 which the author has proved practical with college 

 classes, suggestions for the form of laboratory best 

 suited to the purpose, a full list of the laboratory 

 equipment necessary, and helpful hints as to the 

 conduct of the class work, both Indoors and out. 



With the high developBaent of telescopic photogra- 

 phy, the laboratory phase of astronomy will soon find 

 a place in every up-to-date course of study. 



Representative Plants 



By H. S. PEPOON, Head Instructor, Depart- 

 ment of Botany, Lake View High School, 

 Chicago, Illinois 



lamo, cloth, 163 pages, 60 cents 



A thorough and practical study of the seed plants. 

 It is based upon the pupils' knowledge of everyday 

 forms and is arranged under the divisional heads of 

 seeds, roots, stems, leaves, flowers, and fruits. Copious 

 applicationsofeach new botanical fact, an abundance 

 of laboratory work and many examples of the proces- 

 ses by which the products of common plants are pre- 

 pared for use constitute features of distinct progress. 



The teacher is given abundant subject matter from 

 which to select a course that will be applicable to his 

 own particular class. 



GINN & COMPANY 



Boston New York Chicago LendonI 

 Atlanta Dallas Columbus 

 San Francisco 



4v" 



Waves of the Sea and other 



Water Waves 



By VAUGHAN CORNISH, 



Doctor of Science, Manchester University 

 Fifty illustrations'from photographs taken by the author. Cloth, pp. 375. Price, $2.50 net. 



A. critical examination of observations and measurements of waves and the discovery of the mode of their 

 production. The facts here set dovra in a very interesting manner are the results of fifteen years' study of 

 ■wave action in lakes and rivers as well as upon the ocean at different latitudes. 



A few of the topics ably presented are : — 



SIZE and SPEED of DEEP SEA WAVES ; the numerical relation between length of fetch of wind and 

 height of storm waves ; the wave length of the swell which reaches shores after storms : the give and 

 take between air and water in the development of waves ; the effect of squalls and gusts upon waves. 



On the action of sea ivaves to transport shingle, sand and mud. The building up of beaches — the undertow. 



Stationary and progressfoe •waves in rivers, flood waves, tidal bores, cross-stream progressive waves, sounds 

 of running water, the gushing 

 motion of cataracts, whirls and 

 eddies, conical structures pro- 

 duced by the breaking up of a 

 waterfall, the wave track of a 

 ship. 



This book offers an attractive 

 introduction to physiography and 

 the study of more difficult wave 

 phenomena in earthquakes, atmo- 

 spheric disturbances, as well as 

 wave action in relation to engi- 

 neering structures. 



OlfcDER BLANK 



OPEN COURT PUBLISHING CO. 

 623-633 S. Wabash Ave., Chicago 



Kindly send mc a copy of Wftves Of the Sea, fo* which I enclose poit»I 



order — . for $2.60 



Name 



Address . 



■J 



